Using the breaker is confusing to people who are not accustomed to using breakers in their home as switches. The switch outside is hard to reach, especially for someone with a little arthritis in his/her hands and/or has bifocals which make it hard to see for the correct position.
In my addition of the switch in the foto, there was not one bit of additional wire used. They wire Pods so sloppily that I had plenty. I used the following materials that I had laying around the house: 1 shallow plastic switch box (cost 39¢), switch (69¢), switch plate (28¢), 2" plumber's tape (<1¢), 4 screws (<1¢), and a small block of reclaimed wood from when I ripped out the top bunk (free). Labor about 15 minutes as a retrofit. Total cost in materials $1.38 (retail). Labor using my usual and customary lawyer billing rate

... it depends.